Page 68 - Science Course 1 (Book 2)

Mo8-L4: Vocabulary Review

Direction: On the line before each clue, write the letter of the term that matches it correctly. Then answer
the question that follows.

1. exchanges energy with surroundings A. energy transfer

2. is replaced as fast as or faster than it is used B. law of conservation
of energy
3. states that energy cannot be created or destroyed
C. energy transformation
4. does not exchange matter or energy with the environment
D. renewable energy
5. occurs when one form of energy is converted to another resource

6. is available in limited quantities––or is used faster than it can E. work
be replaced in nature
F. closed system
7. occurs when energy moves from one object to another without
changing form G. resource

8. occurs when a force makes an object move in the direction of H. nonrenewable energy
the force while the force is acting on it resource

9. is a stock of materials, money, or other assets that can be used I. open system

as needed

10. When scientists state that energy transformations are inef cient, do they mean energy is destroyed?
Explain.

Mo8-L4: Key Concept Organizer

Direction: Circle the term in parentheses that correctly completes each sentence.

1. The law of conservation of energy says that energy can be (reduced, transformed) from one form to
another, but it cannot be created or (destroyed, transferred).

2. An energy (transfer, transformation) occurs when energy moves from one object to another without
changing form.

3. When a force acts on an object and the object moves in the direction of the force, a transfer of energy
called (direction, work) has occurred.

4. One constant about energy transformations is that some energy will always be transformed into
(thermal, radiant) energy.

5. During energy transformations, not all energy transformed is transformed to a(n) (ef cient, usable) form of
energy.

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